Education Collections allow us to curate the most relevant online resources related to specific NOVA programs. Use this collection of resources as a source of inspiration for your classroom: find a ...

THE “periodic” classification of the elements plays such an important part in courses of inorganic chemistry for students that a large wall diagram illustrating this classification has now become a ...

To the three requirements of a modern Periodic Table, as stated by A. A. Clifford 1, must be added a fourth, namely, that it should be in as close accord as possible with chemical facts, and above all ...